{
  "manageEntity": {
    "action": "Save",
    "entityId": "563075313",
    "entityType": "Track",
    "nonce": "0xd29acf65ab62751498d3e59698af3820ae6cab1b56db159ea36de95d2856b140",
    "signature": "0x56ca8f4e07aafbc659c468195d5129ba78ea1db9c7c6849f28d4d55e8fa83518771590125cb16110d17dc79620b5b9adc3fd37ff83e67c789501a8fb73a0344d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}